Mismatch in i20 and DS160

I m studying on H4 and traveling to India for F1. In my i20 the program start & end dates are mentioned as 20 Aug 2018 - 31 August 2020.But I am actually half way down my course and will graduate spring 2019. In such scenario, what should be my intended length of stay in Form DS160? As i am already studying, I might have to show my transcripts and fees receipts to the VO. Will this information be contradictory as my i20 says otherwise?

Better to keep DS160 same as I20